Strategy for Data Synthesis
Graphs and tables created with Microsoft Excel (Redmond, Wash.) were used to summarize data. Statistical analyses were conducted with GraphPad Prism (version 7.0, GraphPad Software, Inc, USA). Pairwise correlations (AMSTAR Score vs. Impact Factor, AMSTAR Score vs. Total # of Citations, AMSTAR Score vs. Publication Year) were evaluated using the Pearson correlation coefficient (r). The difference in AMSTAR Score by source of funding (government vs. institution, Cochrane vs. non-Cochrane, etc.) was evaluated with a two-tailed T-test. A P-value of less than 0.05 was considered statistically significant.